Bubble Size Distribution near the Vessel Wall in a Gas Sparged Vessel Agitated by Pitched Blade Paddle Up-Pumping
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概要
- 論文の詳細を見る
For understanding of gas–liquid mixing characteristics in an aerated agitated vessel, knowledge of bubble size distribution is very important. In this work, bubble size distribution and interfacial area were investigated for making a comparison of a pitched blade paddle creating upward flow with the Rushton disc turbine and Scaba SRGT impeller, which are commonly recommended for gas–liquid mixing. The results indicated that the size of the bubble created by the up-pumping of the pitched blade paddle could be kept small and the enhanced interfacial area could be maintained constant until 22.2 vvm, while large bubbles increased and the interfacial area decreased with an increasing gas flow rate, 4.8–15.8 vvm, for DT and SRGT. The correlation of the Sauter mean diameter with the gas flow rate Qg was derived at large gas flow rates for three impellers.
- 2007-04-01
著者
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TAKAHASHI Koji
Department of Pediatrics, Nihon Kokan Hospital
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NISHIO Taku
Process Development Research Laboratories, Lion Corp.
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Nishio Taku
Process Development Research Laboratories Lion Corp.
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Takahashi Koji
Department Of Aeronautics And Astronautics Kyushu University
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Takahashi Koji
Department of Chemistry and Chemical Engineering, Yamagata University
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TAKAHASHI Koji
Departent of Materials Science and Engineering,Faculty of Engineering,Yamagata University
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